> plot(rep(c(1,5,10),each=5),c(jitter(rep(100,5),factor=1),jitter(rep(100,5),factor=5),jitter(rep(100,5),factor=10)),col=c("red","blue","green","gray","black"),xlim=c(-2,13),xlab="",ylab="y",xaxt="n",main="jitter(rep(100,5)) with different factor")> axis(1,at=c(1,5,10),labels=c(paste("factor=",c(1,5,10),sep="")))